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56 lines
2.1 KiB
Python
56 lines
2.1 KiB
Python
from image.docker.schema1 import DOCKER_SCHEMA1_CONTENT_TYPES, DockerSchema1Manifest
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from image.docker.schema2 import (
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DOCKER_SCHEMA2_MANIFEST_CONTENT_TYPE,
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DOCKER_SCHEMA2_MANIFESTLIST_CONTENT_TYPE,
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)
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from image.docker.schema2.list import DockerSchema2ManifestList
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from image.docker.schema2.manifest import DockerSchema2Manifest
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from image.oci import OCI_IMAGE_INDEX_CONTENT_TYPE, OCI_IMAGE_MANIFEST_CONTENT_TYPE
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from image.oci.index import OCIIndex
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from image.oci.manifest import OCIManifest
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from image.shared import ManifestException
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from image.shared.types import SparseManifestList
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from util.bytes import Bytes
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MANIFEST_LIST_TYPES = [DOCKER_SCHEMA2_MANIFESTLIST_CONTENT_TYPE, OCI_IMAGE_INDEX_CONTENT_TYPE]
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def is_manifest_list_type(content_type):
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"""Returns True if the given content type refers to a manifest list of some kind."""
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return content_type in MANIFEST_LIST_TYPES
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def parse_manifest_from_bytes(
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manifest_bytes,
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media_type,
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validate=True,
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sparse_manifest_support=False,
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ignore_unknown_mediatypes=False,
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):
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"""
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Parses and returns a manifest from the given bytes, for the given media type.
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Raises a ManifestException if the parse fails for some reason.
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"""
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assert isinstance(manifest_bytes, Bytes)
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if is_manifest_list_type(media_type) and sparse_manifest_support:
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return SparseManifestList(manifest_bytes, media_type)
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if media_type == DOCKER_SCHEMA2_MANIFEST_CONTENT_TYPE:
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return DockerSchema2Manifest(manifest_bytes)
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if media_type == DOCKER_SCHEMA2_MANIFESTLIST_CONTENT_TYPE:
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return DockerSchema2ManifestList(manifest_bytes)
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if media_type == OCI_IMAGE_MANIFEST_CONTENT_TYPE:
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return OCIManifest(manifest_bytes, ignore_unknown_mediatypes=ignore_unknown_mediatypes)
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if media_type == OCI_IMAGE_INDEX_CONTENT_TYPE:
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return OCIIndex(manifest_bytes, ignore_unknown_mediatypes=ignore_unknown_mediatypes)
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if media_type in DOCKER_SCHEMA1_CONTENT_TYPES:
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return DockerSchema1Manifest(manifest_bytes, validate=validate)
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raise ManifestException("Unknown or unsupported manifest media type `%s`" % media_type)
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